package edu.ut.ece382c.valloy.ast;

import edu.mit.csail.sdg.alloy4.Pos;

public abstract class Node {
	
    /** Returns a Pos object representing the position of this Expr. */
    public Pos pos() { return Pos.UNKNOWN; }

    /** Returns a Pos object representing the entire span of this Expr and all its subexpressions. */
    public Pos span() { return pos(); }
}
